Improvement in gas-holders



"T. R. WHITE.

improvement in Gas-H-bld'ers Patented Aug, 6,1872.

UNITED STATES PATENT OFEIoE.

lMPROVEMENT IN GAS-HOLDERS. I

Specification forming, part of Letters Patent No. 130,346, dated August6, 1872.

Specification describing an Improvement in Gas-Holders, invented byTHOMAS 1%. WHITE, of the city and county of Philadelphia, State ofPennsylvania.

Improvemcntin Gus-Holders.

My invention relates to that class of gasholders in which air-chambersare employed to facilitate the filling of gasholders by reducing theback pressure from the same to the retorts; and my invention consists inproviding the holder A, best observed in the per-- spective view, Fig.1, with an annular airchamber, 13, at its lower submerged end, the saidair-chamber being filled with air through a pipe, D, communicating witha pump, for the purpose of buoying up the holder when the latter isbeing filled with gas, thus reducing the usual back pressure from thesame to the retorts; and after the holder has been filled the air may bewithdrawn from the chamber B, when the full pressure of the holder willbe exerted as usual to force the gas through the pipes to the points ofconsumption.

By buoying up the holder, as above described, the back pressure from thesame to the retorts is so reduced that'very little pumping is required,and a much purer quality of gas is obtained.

The holder isprovided with a mercury or other gage, a, shown in thesectional View, Fig. 2, which enables the pressure upon the gas to beregulated as required, by forcing air into or discharging it from thechamber B, and the escape of air from the open lower end of the latterto the interior of the holder is efiectually prevented by extending theinner wall I) of the chamber to a lower point than the outer wall 0, sothat when the chamber becomes filled with air the latter must passbeneath the outer wall a, and then bubble up through the water, insteadof passing into the body of the holder.

In the winter season steam instead of air might be pumped into thechamber B for the purpose of heating and preventing the freezing of thewater, and of b'uoying up the holder; but in such case a rapidcondensation would take place, and constant pumping would be necessaryin order to keep the chamber filled with steam.

I elain1- 1. A gas-holder, having entirely round its lower edge anannular air-chamber, 6, open at the bottom, and communicating with anairpump, all as set forth.

2. The said air-chamber, bounded by two sides, the inner one of whichprojects below the outer one, as and for the purpose set forth.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

THOS. R. WHITE.

Witnesses:

WM. A. STEEL, HARRY W. DOUTY.

